Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae9152030630dd23…

MALICIOUS

PDF

77.5 KB Created: 2021-09-10 12:13:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 570a41e93f9e29e9796e52833e0868a3 SHA-1: 2c38795ed1f44f349c5924aec75b87a698268a13 SHA-256: ae9152030630dd23d41b0ac7da73325dc27da5862f59c602e869011e66617b64
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and link farms, many pointing to compromised WordPress upload directories, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://nomylo.ru/uplcv?utm_term=jogos+homem+aranha+para+android+gratis PDF link annotation
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132e2a5c140a---nikofinaxiwex.pdfIn PDF document text
    • https://alasclub.gr/neuro/ckfinder/userfiles/files/36197421314.pdfIn PDF document text
    • http://aquatherm-graz.at/files/goredazuzageleveze.pdfIn PDF document text
    • http://phutungotodungha.com/img/files/gepikokibipulowiloretajuv.pdfIn PDF document text
    • http://onthebroadway.com/CPD/adminpanel/upload/file/madisavimuket.pdfIn PDF document text
    • http://el-master.ru/userfiles/file/22686440757.pdfIn PDF document text
    • http://studiodispirito.it/userfiles/file/xivivulukojuxudaje.pdfIn PDF document text
    • http://france-ex.com/images/blog/file/69475750139.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/200593d5e915feea6611211b1d231186/44520295950.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161313d1c5d9f5---62385015454.pdfIn PDF document text
    • https://hanedantoptan.com/upload/files/kavur.pdfIn PDF document text
    • https://lose-weight.tw/upload/files/vivex.pdfIn PDF document text
    • http://gapp.fr/medias/files/85490459604.pdfIn PDF document text
    • http://www.otevrenysklep.cz/ckfinder/userfiles/files/rivekapuwamexakurugagus.pdfIn PDF document text
    • https://12shio3.com/contents/files/doralofusitedaponivufe.pdfIn PDF document text
    • https://senegal4d.com/contents/files/lozezokokilebisobe.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb0a29158b---47042326157.pdfIn PDF document text
    • http://bischofs-scheune.de/userfiles/file/jojejuvofofabugoxu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f8ab7e750b---57327843811.pdfIn PDF document text
    • https://ancoraeducacion.com/images/92443885702.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/musepifelekosofizupawiwa.pdfIn PDF document text
    • http://szjglaw.com/uploadfile/file/2021090214184973499.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/4190aa51a26d70f2946a925dda66db28/lutexex.pdfIn PDF document text
    • http://proallprint.com/userfiles/files/vegaraxurobupokitedoraso.pdfIn PDF document text
    • http://vetcasatenovo.it/userfiles/files/varos.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7DD 18944 bytes
SHA-256: d8b34008431a0db068f782f2fb1db553c5351bb961f6ff7f26deba78889007f8
font_01_sfnt_off0000f743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF743 10784 bytes
SHA-256: 57e1c198723eb61bf15f3b70f3d9a132ec8e6e27da722f019f80c7767d736f87
font_02_sfnt_off00010fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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